1.   Ishmael says they are whales because they spout and have horizontal tails.

2.   Hall also said that the elevators, the adjustable surfaces on the horizontal tail that are used to raise or lower the nose, moved to uneven positions.

3.   The fuselage has been lengthened by two feet and a second horizontal tail has been added.

4.   Without the pin, a device allowing the pilot to control the movement of the horizontal tail surface disconnected, leaving Duke helpless to guide the plane.

5.   The elevator of an aircraft is part of the horizontal tail wing, usually the rear section.